net/mac80211/rate.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef IEEE80211_RATE_H
  12 #define IEEE80211_RATE_H
  13
  14 #include <linux/netdevice.h>
  15 #include <linux/skbuff.h>
  16 #include <linux/types.h>
  17 #include <net/mac80211.h>
  18 #include "ieee80211_i.h"
  19 #include "sta_info.h"
  20 #include "driver-ops.h"
  21
  22 struct rate_control_ref {
  23         struct ieee80211_local *local;
  24         const struct rate_control_ops *ops;
  25         void *priv;
  26 };
  27
  28 void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
  29                            struct sta_info *sta,
  30                            struct ieee80211_tx_rate_control *txrc);
  31
  32 static inline void rate_control_tx_status(struct ieee80211_local *local,
  33                                           struct ieee80211_supported_band *sband,
  34                                           struct sta_info *sta,
  35                                           struct sk_buff *skb)
  36 {
  37         struct rate_control_ref *ref = local->rate_ctrl;
  38         struct ieee80211_sta *ista = &sta->sta;
  39         void *priv_sta = sta->rate_ctrl_priv;
  40
  41         if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
  42                 return;
  43
  44         ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
  45 }
  46
  47
  48 static inline void rate_control_rate_init(struct sta_info *sta)
  49 {
  50         struct ieee80211_local *local = sta->sdata->local;
  51         struct rate_control_ref *ref = sta->rate_ctrl;
  52         struct ieee80211_sta *ista = &sta->sta;
  53         void *priv_sta = sta->rate_ctrl_priv;
  54         struct ieee80211_supported_band *sband;
  55         struct ieee80211_chanctx_conf *chanctx_conf;
  56
  57         ieee80211_sta_set_rx_nss(sta);
  58
  59         if (!ref)
  60                 return;
  61
  62         rcu_read_lock();
  63
  64         chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
  65         if (WARN_ON(!chanctx_conf)) {
  66                 rcu_read_unlock();
  67                 return;
  68         }
  69
  70         sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band];
  71
  72         ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista,
  73                             priv_sta);
  74         rcu_read_unlock();
  75         set_sta_flag(sta, WLAN_STA_RATE_CONTROL);
  76 }
  77
  78 static inline void rate_control_rate_update(struct ieee80211_local *local,
  79                                     struct ieee80211_supported_band *sband,
  80                                     struct sta_info *sta, u32 changed)
  81 {
  82         struct rate_control_ref *ref = local->rate_ctrl;
  83         struct ieee80211_sta *ista = &sta->sta;
  84         void *priv_sta = sta->rate_ctrl_priv;
  85         struct ieee80211_chanctx_conf *chanctx_conf;
  86
  87         if (ref && ref->ops->rate_update) {
  88                 rcu_read_lock();
  89
  90                 chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf);
  91                 if (WARN_ON(!chanctx_conf)) {
  92                         rcu_read_unlock();
  93                         return;
  94                 }
  95
  96                 ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def,
  97                                       ista, priv_sta, changed);
  98                 rcu_read_unlock();
  99         }
 100         drv_sta_rc_update(local, sta->sdata, &sta->sta, changed);
 101 }
 102
 103 static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
 104                                            struct ieee80211_sta *sta,
 105                                            gfp_t gfp)
 106 {
 107         return ref->ops->alloc_sta(ref->priv, sta, gfp);
 108 }
 109
 110 static inline void rate_control_free_sta(struct sta_info *sta)
 111 {
 112         struct rate_control_ref *ref = sta->rate_ctrl;
 113         struct ieee80211_sta *ista = &sta->sta;
 114         void *priv_sta = sta->rate_ctrl_priv;
 115
 116         ref->ops->free_sta(ref->priv, ista, priv_sta);
 117 }
 118
 119 static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
 120 {
 121 #ifdef CONFIG_MAC80211_DEBUGFS
 122         struct rate_control_ref *ref = sta->rate_ctrl;
 123         if (ref && sta->debugfs.dir && ref->ops->add_sta_debugfs)
 124                 ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
 125                                           sta->debugfs.dir);
 126 #endif
 127 }
 128
 129 static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
 130 {
 131 #ifdef CONFIG_MAC80211_DEBUGFS
 132         struct rate_control_ref *ref = sta->rate_ctrl;
 133         if (ref && ref->ops->remove_sta_debugfs)
 134                 ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
 135 #endif
 136 }
 137
 138 /* Get a reference to the rate control algorithm. If `name' is NULL, get the
 139  * first available algorithm. */
 140 int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
 141                                  const char *name);
 142 void rate_control_deinitialize(struct ieee80211_local *local);
 143
 144
 145 /* Rate control algorithms */
 146 #ifdef CONFIG_MAC80211_RC_MINSTREL
 147 int rc80211_minstrel_init(void);
 148 void rc80211_minstrel_exit(void);
 149 #else
 150 static inline int rc80211_minstrel_init(void)
 151 {
 152         return 0;
 153 }
 154 static inline void rc80211_minstrel_exit(void)
 155 {
 156 }
 157 #endif
 158
 159 #ifdef CONFIG_MAC80211_RC_MINSTREL_HT
 160 int rc80211_minstrel_ht_init(void);
 161 void rc80211_minstrel_ht_exit(void);
 162 #else
 163 static inline int rc80211_minstrel_ht_init(void)
 164 {
 165         return 0;
 166 }
 167 static inline void rc80211_minstrel_ht_exit(void)
 168 {
 169 }
 170 #endif
 171
 172
 173 #endif /* IEEE80211_RATE_H */